File : sem_dist.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- S E M _ D I S T --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1992-2012, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 -- Semantic processing for distribution annex facilities
27
28 with Snames; use Snames;
29 with Types; use Types;
30
31 package Sem_Dist is
32
33 function Get_PCS_Name return PCS_Names;
34 -- Return the name of a literal of type DSA_Implementation_Name in package
35 -- System.Partition_Interface indicating what PCS is currently in use.
36
37 function Get_PCS_Version return Int;
38 -- Return the version number of the PCS API implemented by the PCS.
39 -- The consistency of this version with the one expected by Exp_Dist
40 -- (Exp_Dist.PCS_Version_Number) in Rtsfind.RTE.Check_RPC.
41 -- If no PCS version information is available, 0 is returned.
42
43 function Is_Valid_Remote_Object_Type (E : Entity_Id) return Boolean;
44 -- True if tagged type E is a valid candidate as the root type of the
45 -- designated type for a RACW, i.e. a tagged limited private type, or a
46 -- limited interface type, or a private extension of such a type.
47
48 procedure Add_Stub_Constructs (N : Node_Id);
49 -- Create the stubs constructs for a remote call interface package
50 -- specification or body or for a shared passive specification. For caller
51 -- stubs, expansion takes place directly in the specification and no
52 -- additional compilation unit is created.
53
54 function Build_RAS_Primitive_Specification
55 (Subp_Spec : Node_Id;
56 Remote_Object_Type : Node_Id) return Node_Id;
57 -- Build a subprogram specification for the primitive operation of the
58 -- Remote_Object_Type used to implement a remote access-to-subprogram
59 -- type whose parameter profile is given by specification Subp_Spec.
60
61 function Is_All_Remote_Call (N : Node_Id) return Boolean;
62 -- Check whether a function or procedure call should be expanded into
63 -- a remote call, because the entity is declared in a package decl that
64 -- is not currently in scope, and the proper pragmas apply.
65
66 procedure Process_Partition_Id (N : Node_Id);
67 -- Replace attribute reference with call to runtime function. The result
68 -- is converted to the context type, because the attribute yields a
69 -- universal integer value.
70
71 procedure Process_Remote_AST_Attribute (N : Node_Id; New_Type : Entity_Id);
72 -- Given N, an access attribute reference node whose prefix is a
73 -- remote subprogram, rewrite N with a call to a conversion function
74 -- whose return type is New_Type.
75
76 procedure Process_Remote_AST_Declaration (N : Node_Id);
77 -- Given N, an access to subprogram type declaration node in RCI or remote
78 -- types unit, build a new record (fat pointer) type declaration using the
79 -- old Defining_Identifier of N and a link to the old declaration node N
80 -- whose Defining_Identifier is changed. We also construct declarations of
81 -- two subprograms in the unit specification which handle remote access to
82 -- subprogram type (fat pointer) dereference and the unit receiver that
83 -- handles remote calls (from remote access to subprogram type values.)
84
85 function Remote_AST_E_Dereference (P : Node_Id) return Boolean;
86 -- If the prefix of an explicit dereference is a record type that
87 -- represent the fat pointer for an Remote access to subprogram, in the
88 -- context of a call, rewrite the enclosing call node into remote call,
89 -- the first actual of which is the fat pointer. Return true if the
90 -- context is correct and the transformation took place.
91
92 function Remote_AST_I_Dereference (P : Node_Id) return Boolean;
93 -- If P is a record type that represents the fat pointer for a remote
94 -- access to subprogram, and P is the prefix of a call, insert an explicit
95 -- dereference and perform the transformation described for the previous
96 -- function.
97
98 function Remote_AST_Null_Value
99 (N : Node_Id;
100 Typ : Entity_Id) return Boolean;
101 -- If N is a null value and Typ a remote access to subprogram type, this
102 -- function will check if null needs to be replaced with an aggregate and
103 -- will return True in this case. Otherwise, it will return False.
104
105 function Package_Specification_Of_Scope (E : Entity_Id) return Node_Id;
106 -- Return the N_Package_Specification corresponding to a scope E
107
108 function Is_RACW_Stub_Type_Operation (Op : Entity_Id) return Boolean;
109 -- True when Op is a primitive operation of an RACW stub type
110
111 end Sem_Dist;